Many problems reported with GRAMPS turn out to be the consequence of installing a new version of GRAMPS "on top" of an older installed version (this is particularly important when installing from source). Such an install can lead to problems both in Windows and Linux. If you have done that and are experiencing problems, it might help uninstalling and installing again.

GRAMPS provides only .gv output format on GraphViz based reports

You have GraphViz package installed but you cannot use all availables output formats into GRAMPS' report based on GraphViz. Maybe your GraphViz package ignored some dependancies, which could be useful, like :